Cascade Range

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Scientists here present a 55 million year plate tectonic and volcanic story - this is how the Pacific northwest of the United States and Canada, including the land and volcanoes, were created.

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Mount Rainier National Park, Washington, USA

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Summer Thunderstorm and Mount Shasta, Siskiyou County, CA by 4 Corners Photo
Via Flickr:
Thunderstorms form around Mount Shasta on a summer afternoon in Siskiyou County, California. Shasta is the most voluminous stratovolcano in the Cascade Volcanic Arc.